Are insecticide-treated bednets more protective against Plasmodium falciparum than Plasmodium vivax- infected mosquitoes?
Abstract Background The outcomes of insecticide-treated bednet (ITN) interventions for malaria control in Papua New Guinea tend to suggest a differential protective effect against Plasmodium falciparum and Plasmodium vivax . Little is known about the impact of ITNs on the relative abundance of mosqu...
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ftdoajarticles:oai:doaj.org/article:d683443a4b55409c9e03e2afa3f7aeea 2023-05-15T15:18:39+02:00 Are insecticide-treated bednets more protective against Plasmodium falciparum than Plasmodium vivax- infected mosquitoes? Bockarie Moses J Dagoro Henry 2006-02-01T00:00:00Z https://doi.org/10.1186/1475-2875-5-15 https://doaj.org/article/d683443a4b55409c9e03e2afa3f7aeea EN eng BMC http://www.malariajournal.com/content/5/1/15 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-5-15 1475-2875 https://doaj.org/article/d683443a4b55409c9e03e2afa3f7aeea Malaria Journal, Vol 5, Iss 1, p 15 (2006) Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2006 ftdoajarticles https://doi.org/10.1186/1475-2875-5-15 2022-12-31T08:03:14Z Abstract Background The outcomes of insecticide-treated bednet (ITN) interventions for malaria control in Papua New Guinea tend to suggest a differential protective effect against Plasmodium falciparum and Plasmodium vivax . Little is known about the impact of ITNs on the relative abundance of mosquitoes infected with either P. falciparum or P. vivax . This paper describes the biting cycle of P. falciparum and P. vivax -infected mosquitoes and the impact of an ITN intervention on the proportion of mosquitoes infected with either parasite species. Methods Entomological investigations were performed in East Sepik (ESP) and New Ireland Provinces (NIP) of PNG. Mosquitoes were collected using the all-night (18:00 - 06:00) landing catch and CDC light-trap methods and species specific malaria sporozoite rates were determined by ELISA. Results and discussion The distribution of sporozoite positive mosquitoes in three four-hour periods (18:00-22:00, 22:00-02:00 & 02:00-06:00) showed that a higher proportion of P. vivax -infected mosquitoes were biting before people retired to bed under the protection of bednets. In the intervention village, the 308 mosquitoes collected before ITNs were introduced included eight (2.0%) P. falciparum -positive and four (1.0%) P. vivax- positive specimens, giving a parasite ratio of 2:1. The sporozoite rate determined from 908 mosquitoes caught after ITNs were introduced showed a significant decrease for P. falciparum (0.7%) and a slight increase for P. vivax (1.3%), resulting in a post intervention parasite ratio of 1:2. In the East Sepik Province, where ITNs were not used, P. falciparum remained the dominant species in 12 monthly mosquito collections and monthly P. falciparum : P. vivax formula varied from 8:1 to 1.2:1. Conclusion These findings suggest that people sleeping under treated bednets may be more exposed to P. vivax than P. falciparum -infected mosquitoes before going to sleep under the protection of bednets. This difference in the biting behaviour of mosquitoes infected ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 5 1 15 |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Bockarie Moses J Dagoro Henry Are insecticide-treated bednets more protective against Plasmodium falciparum than Plasmodium vivax- infected mosquitoes? |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background The outcomes of insecticide-treated bednet (ITN) interventions for malaria control in Papua New Guinea tend to suggest a differential protective effect against Plasmodium falciparum and Plasmodium vivax . Little is known about the impact of ITNs on the relative abundance of mosquitoes infected with either P. falciparum or P. vivax . This paper describes the biting cycle of P. falciparum and P. vivax -infected mosquitoes and the impact of an ITN intervention on the proportion of mosquitoes infected with either parasite species. Methods Entomological investigations were performed in East Sepik (ESP) and New Ireland Provinces (NIP) of PNG. Mosquitoes were collected using the all-night (18:00 - 06:00) landing catch and CDC light-trap methods and species specific malaria sporozoite rates were determined by ELISA. Results and discussion The distribution of sporozoite positive mosquitoes in three four-hour periods (18:00-22:00, 22:00-02:00 & 02:00-06:00) showed that a higher proportion of P. vivax -infected mosquitoes were biting before people retired to bed under the protection of bednets. In the intervention village, the 308 mosquitoes collected before ITNs were introduced included eight (2.0%) P. falciparum -positive and four (1.0%) P. vivax- positive specimens, giving a parasite ratio of 2:1. The sporozoite rate determined from 908 mosquitoes caught after ITNs were introduced showed a significant decrease for P. falciparum (0.7%) and a slight increase for P. vivax (1.3%), resulting in a post intervention parasite ratio of 1:2. In the East Sepik Province, where ITNs were not used, P. falciparum remained the dominant species in 12 monthly mosquito collections and monthly P. falciparum : P. vivax formula varied from 8:1 to 1.2:1. Conclusion These findings suggest that people sleeping under treated bednets may be more exposed to P. vivax than P. falciparum -infected mosquitoes before going to sleep under the protection of bednets. This difference in the biting behaviour of mosquitoes infected ... |
format |
Article in Journal/Newspaper |
author |
Bockarie Moses J Dagoro Henry |
author_facet |
Bockarie Moses J Dagoro Henry |
author_sort |
Bockarie Moses J |
title |
Are insecticide-treated bednets more protective against Plasmodium falciparum than Plasmodium vivax- infected mosquitoes? |
title_short |
Are insecticide-treated bednets more protective against Plasmodium falciparum than Plasmodium vivax- infected mosquitoes? |
title_full |
Are insecticide-treated bednets more protective against Plasmodium falciparum than Plasmodium vivax- infected mosquitoes? |
title_fullStr |
Are insecticide-treated bednets more protective against Plasmodium falciparum than Plasmodium vivax- infected mosquitoes? |
title_full_unstemmed |
Are insecticide-treated bednets more protective against Plasmodium falciparum than Plasmodium vivax- infected mosquitoes? |
title_sort |
are insecticide-treated bednets more protective against plasmodium falciparum than plasmodium vivax- infected mosquitoes? |
publisher |
BMC |
publishDate |
2006 |
url |
https://doi.org/10.1186/1475-2875-5-15 https://doaj.org/article/d683443a4b55409c9e03e2afa3f7aeea |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 5, Iss 1, p 15 (2006) |
op_relation |
http://www.malariajournal.com/content/5/1/15 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-5-15 1475-2875 https://doaj.org/article/d683443a4b55409c9e03e2afa3f7aeea |
op_doi |
https://doi.org/10.1186/1475-2875-5-15 |
container_title |
Malaria Journal |
container_volume |
5 |
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1 |
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15 |
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1766348844878004224 |